Process of making sinks, washbasins, and the like



July 4s 1933., J. sTANlTZ 1,916@

PROCESS OF MAKING SINKS, WASHBASINS, AND THE LIKE Filed Deo. 7, v193.2 2 Sheets-Sheet l ji-f Juy 4, 1933. J, sTANlTz 1,916,910

PROCESS OF MAKING SINKS, WASHBASINS, AND THE LIKE Filed Deo. 7, 1932 2 Sheets-Sheet 2 Famed July 4, 1933 UNITED STATES PATENT .o1-F1os JACQUES STANITZ, F WARREN, OHIO, ASSIGNOR To THE YOUNGSTOWN PRESSED STEEL COMPANY, 0F WARREN, OHIO, .A CORPORATION 0F OHIO R l ESSU 1 PROCESS 0F MAKING SINKS, WASHLBASINS, AND THE LIKE .Application filed December 7, 1932. Serial No. 646,207.

This invention relates to improvements in the process of forming sheet metal into sinks, wash basins and the like, of the type which are provided with a comparatively high back lying in a plane substantially at rightangles to the plane of the top of the sink or basin.

By the exercise of my improved process, sinks, wash basins, and the like, can be quickly and cheaply formed from a single piece or blank of sheet metal.

Heretofore, in the forming of such devices from a single piece of sheet metal, diliiculty has been encountered in the step of bending the back up into its vertical position. The first Step in the manufacture of devices of the kind referred to from sheet metal is the drawing down of the fluid-receiving bowl. This bowl is ordinarily provided with a substantially vertical back wall. Consequently, there is a right angle bend at the upper edge of the wall. 1t has been found that if the splash-back is bent upwardly to a vertical osition at or very near the upper edge of the back wall ot this bowl, the metal is likely to be fractured or objectionable bulging or wrinkling may occur. The principal feature of my invention is the provision of a method of manufacture which eliminates this objection.

l'n the accompanying drawings, 1 have shown the sink as it appears during the various stages of manufacture. iin these drawings- Figure 1 is a top plan view of a blank or' sheet of metal from which the sink or basin is formed, showing the fluid-receiving bowl drawn therein; Fig. 2 is a view taken as indicated by the line 2 of Fig. 1; Fig. 3 is a view similar to Fig. 1 showing the blank trimmed for the succeeding operations; Fig. 4 is a top plan view showing the apron, panels and drain rooves formed and, also, the flange for the bac Fig. 5 is an end view of the sink partly formed as shown in Fig. 4; Fig. 6 is a view similar to Fig. 5 showing the notching of the flanges to permit the bending up of the splash-back; Fig. 7 is a view similar to Fig. 6 showing the back bent upwardly into its vertical position; Fig. 8 is a. view similar to 50 Fig. 7 showing pieces welded in the ange on the back; Fig. 9 is a top plan view of the finished sink; Fig. l0 is a view taken as indicated by the line 10 of Fig. 9; and Fig. 11 is a View taken as indicated by the line 11 of Fig. 9.

As shown in the drawings, 10 may indicate a substantially rectangular blank of sheet metal from which the com let/ed sink is to be formed. In Fig. 1, the uid-receiving bowl 11 is shown as already com letely drawn or formed in the blank. The ottom of this bowl is indicated by 11 and the back wall thereof by 11".

After the formation of the Huid-receiving bowl, the blank is trimmed as shown in Fig.

3, principally by making the edges straight,

beveling the corners, and cutting the notches 12B, 12a to define the back 12 and leave sutiicient metal for formation of the apron around the sink.

The sink is then formed as shown in Fig., 4. rFhat is, the iange 13 is formed on the back and the apron 11i is drawn down around the sink. The vdrain grooves 15 may also be formed. 1t is to be particularly noted, how- P ever, that the apron 1li extends some distance back of the plane of the back wall 11b of the duid-receiving bowl 11. As shown in F ig. 5, the back edge or the apron 14 is indicated by 14a. 1t will be seen that this lies some distance back of the plane of the wall 11b.

'lihe ange 13 on the back is then notched, as indicated by 16, where it joins the apron 1li. The back 12 is then bent up into vertical position on the line 17. llt is to be particularly noted that this line 17 lies back of the plane of the back wall 11b of the fluidreceiving bowl. Yllhis leaves a horizontal shelf 18 back of the uid-receiving bowl and in front or the splash-back. if the back 12 is bent up on a line lying substantially in the same plane as the back wall 11", there is very likely to be a fracture, bulging or wrinkling of the metal at the line of the bend. When the bowl is Jformed, a right angle bend is made at the top of the back wall'of the bowl. if the back is bent u along this line, this causes a straightening o this bend, which is very likely to either weaken or fracture the metal or-cause distortion of the same. By

and the like, with a splash-back, which consists in drawin down an integral sheet of metal to form t e Huid-receiving bowl, leaving at one side sufficient metal to form the back; and bending the back upwardly to a substantially vertical position along a line lying back of the plane of the back wall oi the fluid-receiving bowl.

In witness whereof, I have hereunto set my hand, this 29th day of November, 1932.

JACQUES STANITZ. 

